本发明涉及一种变压精馏提纯醋酸甲酯的方法及其生产设备,该方法主要是通过加压精馏塔、常压精馏塔和醋酸甲酯精制塔,对醋酸甲酯、甲醇和水混合液进行变压精馏分离,其基本原理是利用醋酸甲酯-甲醇、醋酸甲酯-水的共沸组成随压力变化灵敏的特点,采用操作压力不同的精馏塔实现醋酸甲酯、 The invention relates to a method for preparing methyl acetate by pressure swing distillation and a production equipment thereof. The method mainly comprises the steps of: pressurizing rectification tower, atmospheric distillation tower and methyl acetate refining tower, Water mixture for pressure distillation, the basic principle is the use of methyl acetate - methanol, methyl acetate - water azeotropic composition with sensitive to pressure changes, the use of different operating pressure distillation column to achieve methyl acetate,